Elevator-gate.



m1. 663,953. Patehted Dec. l8, moo.

' A. 0. sum.

ELEVATDR GATE.

[Application filed Sept. 10, 1900 (No Model.) 2 Sheets-Sheet l.

[I 19) $562 25 CtfiooZ/o,

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* No. 663,953. Patented Dec. l8, I900. k

A. c. BOOTH.

ELEVATOR GATE.

(Application filed Sept. 10, 1900. J (No Model.) 2 SheetsSheet 2.

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NiTED STATES PATENT FFICE.

ALBERT O. BOOTH, OF CEDAR RAPIDS, IOWA, ASSIGNOR OF TVVENTY-TI-IREE FIFTIETHS TO WILLIAM H. DUTTON, OF SAME PLACE.

ELEVATOR-GATE.

SPECIFICATION forming part of Letters Patent No. 663.953, dated December 18, 1900.

. Application filed September 10, 1900. Serial No. 29,578. (No model.)

To all whom it may conc n: path of the door and out of the way thereof Be it known that I, ALBERT O. BOOTH, a when the bolt is in the horizontal position citizen of the United States, residing at Cedar shown in full lines in Fig. 3. When the door Rapids, in the county of Linn and State of is closed, which position is indicated in dot- 5 Iowa, have invented a new and useful Eleted lines in Fig. 3, the bolt may be turned on vator-Gate, of which the following is a speciits pivot, so as to raise its shoulder 9 and enfication. gage the same with the inner edge of the My invention is an improved safety device door, and thereby lock the door in a closed for elevators, the object of my invention beposition. The locking position of the bolt is 1o ing to provide means operated by an elevatorindicated by dotted lines in Fig. 3.

door whereby when the door is open the con- The bolts are connected together in series trolling mechanism which starts the elevatorby a cord or rod 11. The upper end of the car cannot be operated, thereby preventing cord or rod which connects the locking-bolts the car from being started untilafter the together is attached to a vertically-movable I 5 door has been closed. eyebolt 12, which depends from the free end My invention consists in the peculiar conof a pivoted rocking arm 13, the latter being struction and combination of devices hereinpivoted on a support or standard 14:, as at 15. after fully set forth, and pointed out in the A spring 16, which surrounds the shank of claims. the bolt 12, bears under the free end of the 20 In the accompanying drawings, Figure 1 is hanging arm 13, the function of the said a perspective view of an elevatorprovided spring being to normally raise the said arm with my improved safety devices. Figs. 2, and the series of locking-bolts attached there- 3, and 4c are detail elevations of the respecto to the normal position shown in Figs. 1, 2, tive elements of my invention, showing the and 3, with the locking-bolts disengaged from 25 same disposed in operative position. Fig. 5 the doors 3. The lower end of the cord or rod is a detail top plan view of the controller- 11 is attached to a lever 17, which is mounted wheel. on a suitable support 18, as at 19, the said The elevator well or shaft 1, the elevatorlever being disposed in the bottom of the elecar 2, the doors 3 at the various landings, vator shaft or well and below and in proxim- 8o 30 the mechanism for raising and lowering the ity to the controlling-wheel 6. The latter is car, and the controller 4 are of the usual or provided with tappets 20, which when the any suitable construction. The controller wheel is partly rotated by the operation of includes the rope 5 and the sheave or wheel 6. the controller-rope to start the car in either The latter is hereinafter referred to as the direction depresses the lever 17, thereby 5 controller-wheel and may be either didrawing down on the rod or cord 11, and

rectly or indirectly connected to the valvehence turning the locking-bolts on their pivgear or other mechanism for starting, stopots. In the event that all of the doors are ping, and reversing the motion of the car. closed the said bolts may be thus turned to The controller-rope 5 is, as usual, disposed in their locking positions to prevent the doors o 40 the shaft or well and passes through the car. from being opened while the car is in motion; The doors 3 on. the various landings are but if the door at the landing at which the disposed in the same vertical plane, and becar happens to be has not been entirely closed low each doorway in the embodiment of my before attempting to start the car the initial invention here shown is disposed a pivoted movement of the controlling-rope will cause 45 bolt 7, which comprises an outwardly-exthe locking-bolt to engage the lower side of tending arm 8 and an engaging shoulder 9, the door, and hence the controlling-rope canthe bolt being pivoted, as'at 10. In Fig. 3 of not'be operated and the car cannot be started the drawings the door is shown in full lines until the door has been closed and the bolt as being open, and it will be observed that cleared. 50 the door when open moves directly above the To enable my improved safety appliances bolt, the latter being disposed just below the to be employed in connection with existing elevators, I have devised means for attaching tappets to the controlling-wheels of existing elevators, the said means comprising a pair of bars 21, which are clamped to opposite sides of a controller-wheel by means of connecting-bolts 22. The tappets 20 are journaled on bearing-studs 23, which project from the face of one of the clamp-bars 21.

While I have herein shown and hereinbefore described my locking-bolts as being located below the doors, it will be understood that they may be placed above the doors or otherwise located with relation thereto without impairing the efficient operation thereof.

Having thus described my invention, I claim 1. The combination with an elevator-door,

of a pivoted bolt having a shoulder to engage and lock the door when the latter is closed, said bolt being locked by the door when the latter is open, a lever connected to the said pivoted bolt, and a controller, the latter also operating the said lever, whereby when the door is open said controller is locked by said bolt and lever, substantially as described.

2. The combination with an elevator-door, of a bolt to lock said door when closed, a controller, a lever operated by the controller and connected to the bolt, the latter when the door is open serving to lock said controller and when the door is closed serving to lock said door, substantially as described.

3. The combination with an elevator-door, of a bolt to lock said door when closed, a controller-wheel having tappets,a lever depressed by said tappets when said controller-wheel is operated, connections between said lever and bolt and a spring to normally disengage said bolt from said door,substantially as described.

In testimony thatI claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

ALBERT C. BOOTH.

\Vitnesses:

WM. G. CLARK, JAMES W. CLARK. 

